Distributia
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Iain StewartHimself - Presenter (as Prof Iain Stewart)
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Monica GradyHerself - The Open University (as Prof Monica Grady)
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Sarah RussellHerself - Natural History Museum (as Prof Sara Russell)
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Peter SchultzHimself - Brown University (as Prof Peter Schultz)
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Mark BosloughHimself - Sandia National Laboratories (as Dr Mark Boslough)
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Matt GengeHimself - Imperial College London (as Dr Matthew Genge)
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Don YeomansHimself - Jet Propulsion Lab, NASA (as Dr Don Yeomans)
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Richard A. KowalskiHimself - Catalina Sky Survey, Tucson (as Richard Kowalski)
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Timothy B. SpahrHimself - Minor Planet Centre (as Dr Tim Spahr)
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Steven R. ChesleyHimself - Jet Propulsion Lab, NASA (as Dr Steve Chesley)
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Nick KaiserHimself - University of Hawaii (as Prof Nick Kasier)
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Marek KukulaHimself - Royal Observatory Greenwich (as Dr Marek Kukula)
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Alan FitzsimmonsHimself - Queens University Belfast (as Prof Alan Fitzsimmons)
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Hugh LewisHimself - University of Southampton (as Dr Hugh Lewis)
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Natalie StarkeyHerself - The Open University (as Dr Natalie Starkey)